Author Topic: Helix depth calculations?  (Read 594 times)

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Offline Ikantski

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  • location: Ontario
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Helix depth calculations?
« on: April 23, 2016, 05:03:38 PM »
I noticed my helix 5 SI depths weren't matching the lowrance today. I figured maybe it got bumped to an angle. Switched view to sonar and it was drawing the bottom exactly where it should be. It was doing this pretty consistently in > 50 feet of water, they did match in 5 feet of water.  I had it in 200 (not 200/83).

How the heck does this thing calculate its depth if not by bottom position? Is there a setting that can make it more accurate?  It seems like it must be a software issue as the bottom drawing is accurate.

http://i.imgur.com/vDVEOp7.jpg

http://i.imgur.com/hJE2JPD.jpg

Note: It does have the latest firmware update. 


Offline rnvinc

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Re: Helix depth calculations?
« Reply #1 on: April 24, 2016, 08:50:12 AM »
Erratic depth readings can often be attributed to 2 sonars running at the same time ... I've even seen this issue when the 2 sonars are running on separate frequencies ...

You might try shutting off the Lowrance, Restore Defaults and test ...

Rickie


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